[AUS_RAAF]

Thanks Graham for the information. Srecko, the roundel is an oddity for a fighter. Some PR squadrons used the red/blue roundel on the fuselage, however, EF553 was a Mk.VC (trop) with guns (as confirmed by the chalk message near the cockpit). Another unusual feature in the pic are the light coloured patches on the upper spine of all three Spitfires (just forward of the rear fuselage band).

Drew